Key parameters at a glance
- A radius of 2.40 Earth radii
- A mass of 6.35 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 14.246 days
- Semi-major axis 0.1048 AU
- Equilibrium temperature 585 K (312 °C)
- Distance from Earth 150.72 light-years
- Earth Similarity Index 0.437
- Travel time at Voyager 1 speed 2,658,015 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around HIP 113103
HIP 113103 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HIP 113103 b | Super-Earth | 1.83 | 4.00 | 7.610 | 721 | 2023 |
| HIP 113103 c this | Sub-Neptune | 2.40 | 6.35 | 14.246 | 585 | 2023 |
HIP 113103 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1333of 1978
top 67.3%
This planet
2.40R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | HIP 113103 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.40 | 11.21 |
| Mass (M⊕) | 1.00 | 6.35 | 317.83 |
| Density (g/cm³) | 5.51 | 2.52 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 180.49 | 0.037 |
Star Catalogue Identifiers
HIP
HIP 113103
TIC
TIC 121490076
Gaia DR2
Gaia DR2 6541360574788758016
Gaia DR3
Gaia DR3 6541360574788758016
System
HIP 113103
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 14.25 Earth days (3.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1048 AU.
Transit Fingerprint
Depth
0.105 %
Duration
4.234 h
Impact parameter b
0.614
Rp / R★
0.030300
Transit midpoint (BJD)
2,458,337.0559
Photometric dip
Transit produces a flux drop of 1,051 ppm lasting ≈ 4.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030300
Semi-major axis / stellar radius
32.490
Impact parameter (b)
0.614
Transit mid-time (BJD)
2,458,337.0559
Long. of periastron (ω)
-70.00°
Angular separation (arcsec)
2.27000
Eq. Temperature
585K
(312 °C)
Insolation (S⊕)
180.49
Earth = 1.00
Earth Similarity (ESI)
0.437
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Lowson et al. 2023Instrument
TESS CCD Array
Publication
2023-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: HIP 113103
Spectral Class
K-type orange
Effective Temperature
4,930 K — cooler than the Sun (5,778 K)
Estimated Age
0.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.742 R☉
Stellar Mass
0.761 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
2.499 g/cm³
Systemic radial velocity
12.85 km/s
Rotational v·sin i
3.00 km/s
Rotation period
9.92 days
Metallicity ratio
[M/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
21.610 mas
Total Proper Motion
27.638 mas/yr
PM Right Ascension
2.01 mas/yr
PM Declination
27.56 mas/yr
Galactic Cartesian (pc)
x = 0.701 · y = -0.207 · z = -0.682
Equatorial (J2000)
RA 343.57238° · Dec -43.01023°
Galactic ℓ, b
351.450° · -61.479°
Ecliptic λ, β
326.676° · -32.928°
HTM-20 index
1094931581
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